Schedule of Reconciliation of Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Line Items]
U.S. statutory federal tax rate	35.00%	35.00%	35.00%
Foreign taxes	(10.80%)	(11.50%)	(12.60%)
U.S. research and development credit	(7.20%)		(1.10%)
Other U.S. permanent items	1.10%	(2.80%)	5.70%
Valuation allowance	0.40%	(0.50%)	(86.60%)
State income taxes, net of federal tax benefit	0.10%	(1.70%)
Other, net	(0.30%)	(0.10%)	(0.80%)
Effective tax rate, Total	18.30%	18.40%	(60.40%)